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When salt and water are combined, they form a salt or saline solution. How much ml of water must be added to 150 mL of an 80% saline solution to produce a 30% saline solution?

User Soni Sol
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1 Answer

9 votes

Answer:

We must add 400 ml of water.

Explanation:

We can use the following equation:


C_(i)V_(i)=C_(f)V_(f)

Where:

  • C(i) is the initial concentration of the solution (80%)
  • C(f) is the final concentration of the solution (30%)
  • V(i) is the initial volume (150 ml)
  • V(f) is the final volume

Now, we just need to solve the equation for V(f).


V_(f)=(C_(i)V_(i))/(C_(f))


V_(f)=(80*150)/(30)


V_(f)=400\: ml

Therefore, we must add 400 ml of water.

I hope it helps you!

User Sandeep Gupta
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